具有 II 型和 S 型连接载流子迁移机制的 ZnO/MgAl-LDH/FeOOH 三元复合光催化剂在降解 TC 溶液中的光催化性能研究

IF 6.5 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Xuying Duan , Fucheng Yu , Ruobing Jiang , Jinlong Ren , Jielin Zhang , Chenchen Feng , Cuixia Li , Kechao Hu , Xiaogang Hou
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引用次数: 0

摘要

高性能光催化剂的合成是光催化降解技术研究的一个关键方面。为了满足这一需求,我们通过水热法、煅烧法和超声波辅助湿法浸渍法等多步骤合成了一种新型 ZnO/MgAl-LDH/FeOOH 三元复合光催化剂。据观察,该三元复合光催化剂在光催化过程中能有效分离光生载流子,并遵循 II 型和 S 型载流子迁移机制。对该复合光催化剂在降解四环素(TC)溶液中的光催化特性进行的研究表明,-O2-自由基的还原和-OH自由基的氧化可有效降解TC溶液。在三元复合光催化剂的光催化作用下,30 分钟内 TC 溶液的降解效率分别是 ZnO、MgAl-LDH 和 FeOOH 单组分样品的 1.54、1.11 和 3.15 倍。此外,还阐明了复合材料光催化作用下 TC 分子的降解途径。这些研究成果为进一步研究这种复合光催化剂奠定了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Study on the photocatalytic properties of the ternary ZnO/MgAl-LDH/FeOOH composite photocatalyst with a Type-II and S-scheme linked carrier migration mechanism in degrading TC solution
The synthesis of high-performance photocatalysts represents a pivotal aspect of research into photocatalytic degradation technology. In order to address this need, a novel ZnO/MgAl-LDH/FeOOH ternary composite photocatalyst has been synthesized via a multi-step process involving the hydrothermal, calcination and ultrasonic-assisted wet impregnation methods. The ternary composite photocatalyst was observed to demonstrate effective separation of photogenerated carriers in photocatalysis, following a Type-II and S-scheme linked carrier migration mechanism. An examination of the photocatalytic characteristics of the composite photocatalyst in the degradation of a tetracycline (TC) solution revealed that the reduction of •O2- radicals and the oxidation of •OH radicals resulted in the effective degradation of the TC solution. The degradation efficiency of the TC solution under the photocatalysis of the ternary composite photocatalyst was observed to be 1.54, 1.11 and 3.15 times that of the single-component samples of ZnO, MgAl-LDH and FeOOH, respectively, in 30 min. Moreover, the degradation pathway of TC molecules under the photocatalysis of the composite has been elucidated. The research findings provide a foundation for further investigation into this composite photocatalyst.
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来源期刊
Composites Communications
Composites Communications Materials Science-Ceramics and Composites
CiteScore
12.10
自引率
10.00%
发文量
340
审稿时长
36 days
期刊介绍: Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.
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